The Setup:
I have created OU's for each department in our company.
I have moved all the users into their respective OU.
I have created a Query-Based Distribution Group so that I don't have to add them to the distribution group manually.

The Problem:
The users that receive email to those distribution lists are not always in that particular OU.

The Question:
How can I set up a QBD Group for a particular OU that will send to everyone in that OU and also be able to add specific users from other OU's to the query?